Duffy, S. A., Ronis, D. L., Waltje, A. H., & Choi, S. H. (2013). Protocol of a randomized controlled trial of sun protection interventions for operating engineers. BioMed Central.
استشهاد بنمط شيكاغوDuffy, Sonia A., David L. Ronis, Andrea H. Waltje, و Seung Hee Choi. Protocol of a Randomized Controlled Trial of Sun Protection Interventions for Operating Engineers. BioMed Central, 2013.
MLA استشهادDuffy, Sonia A., David L. Ronis, Andrea H. Waltje, و Seung Hee Choi. Protocol of a Randomized Controlled Trial of Sun Protection Interventions for Operating Engineers. BioMed Central, 2013.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.